Vestigial Structures and Evolutionary Functions

The video discusses anatomical structures that provide evidence for evolution, focusing on vestigial and mosaic structures. Vestigial structures, like wisdom teeth and the appendix, are remnants of our ancestors' functional anatomy. Mosaic structures, such as human hands and whale limbs, evolved for one purpose but adapted for another. These examples illustrate how evolution repurposes anatomical features over time.

What are vestigial structures?

• Structures that have a current function

• Structures that have lost their original function

• Structures that are newly evolved

• Structures that are only found in humans

Why do humans have wisdom teeth?

• For better speech

• For aesthetic purposes

• For improved taste

• For extra chewing ability in the past

Which of the following is an example of a vestigial structure in humans?

• Heart

• Lungs

• Appendix

• Brain

What is the potential residual function of the appendix?

• Enhancing hearing

• Aiding in digestion

• Strengthening bones

• Improving vision

What is the historical function of the appendix?

• To regulate body temperature

• To help digest a protein-rich diet

• To help digest a protein-poor diet

• To store vitamins

What are mosaic structures?

• Structures that have no function

• Structures that evolved for one purpose but are used for another

• Structures that are identical in all species

• Structures that are only found in aquatic animals

How did human hands evolve according to the concept of mosaic structures?

• For locomotion

• For flying

• For swimming

• For grasping and using tools

What was the original purpose of human hands?

• Grasping

• Locomotion

• Flying

• Swimming

Which of the following is NOT a vestigial structure?

• Heart

• Chest hair

• Appendix

• Wisdom teeth

What do vestigial and mosaic structures collectively demonstrate?

• The evidence of evolution

• The randomness of evolution

• The absence of evolution

• The perfection of design